Struct SqliteBackend 

pub struct SqliteBackend { /* private fields */ }

Implementations

impl SqliteBackend

pub fn open(path: impl AsRef<Path>) -> Result<Self, BackendError>

Opens a connection to the SQLite database.

Uses SqliteOptions::default for SQLite pragmas and cross-process change detection.

Errors

Returns BackendError::Open when the database cannot be opened, SQLite pragmas cannot be applied, or the settings table cannot be created.

pub fn open_with_options( path: impl AsRef<Path>, options: SqliteOptions, ) -> Result<Self, BackendError>

Opens a connection to the SQLite database with explicit backend options.

Applies the configured SQLite pragmas, creates the settings table, and starts the cross-process watcher when options.cross_process is true.

Errors

Returns BackendError::Open when the database cannot be opened, SQLite pragmas cannot be applied, or the settings table cannot be created.

Trait Implementations

impl Drop for SqliteBackend

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl StorageBackend for SqliteBackend

fn load_all(&self) -> Result<HashMap<String, StoredValue>, BackendError>

Load all persisted settings into memory. This method is called at load and on watcher ticks.

fn set(&self, key: &str, value: &StoredValue) -> Result<(), BackendError>

Persist a setting to the database.

fn delete(&self, key: &str) -> Result<(), BackendError>

Remove a setting from the database.

fn watch_changes(&self) -> Option<Receiver<()>>

Subscribe to the backend storage event stream. Default returns None. The returned receiver fires for every change, including own-process writes.